Boeing XB-55 (company designation Model 474) was a proposed Boeing aircraft designed to be a strategic bomber.
The Bundesstraße 55 (abbr. B 55) is a Bundesstraße road in Germany, connecting Jülich with Rheda-Wiedenbrück via Cologne, Gummersbach, Olpe and Meschede.
HLA-B55 (B55) is an HLA-B serotype.
The Karoonda Highway is a state-controlled highway in South Australia linking the Murray River towns of Murray Bridge and Loxton.